Oil-well pump.



R. GREGORY.

OIL WELL PUMP.

APPLICATION FILED Aue.ao. |919.

Patented Dec. 30, 1919.

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UNITED sTArnsrnrENT- OFFICE. i

RALPH GREGORY, OF KANSAS CITY, MISSOURI, ASSIGNOR-TO OIL WELL BECLAMATIDN' COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

OIL-WELL PUMP.

Speoilcation o! Letters Patent.

Patented Dec. 30, 1919.

Application filed August 30, 1919. Serial No. 320,910.

To all 'whom it may concern: Be it known that -I, RALPH GREGORY, a citizen of the UnitedmStates, and resident of Kansas City, county of Jackson, and State 'of Missouri, have invented certain new and useful Improvements in Oil-Well Pumps, of which the fllowing is a speciiication and which are illustrated .in the accompanying drawings, forming a part thereof.

The invention relates to pumps .for lifting liquids by compressed air, and especially to those whlch are intended to be utilized in pumping oil from wells,

The invention contemplates a pump which is self-contained, meaning thereby that all of its parts are independent of the casing of the well within which it is used; andthe object of the invention is to provide such a pump which is of simple and improved construction, having particular reference to the facility with which the parts are assembled during the operation of setting thepump in the well, and the provision made for supprting the weight of the long lengths of pipe which enter into the construction without unduly restricting the passages of the pump to the free movement of Huid.

In the accompanying drawings* Figure 1 is a central 4vertical sectional view showing one form of the improved pump with a detail of the surrounding well casing; and

Fig.` 2 is a horizontal sectional view taken on the line 2-2 of Fig. 1, the well casing being omitted. i

As the parts of the pump are necessarily limited in size in vcross-section toepermt of their being entered in a well casing, as 10, the pump barrel18 is preferably of great length to ail'ord large capacit In practice this pump barrel willusual y extend to a point near the bottom of the well and will have a foot valve'20 at its lower end. As shown, the foot valve 20 takes the -form of a ball check comprising a tubular valve casing 19, coupled to the lower end of theV pump barrel 18, ball 23 mounted within the casing 19, and an apertured seat`21 fg; ihe e.. sired a perforated pipe 22, constituting a filter. may be connected with the valve seat 21 to extend below the same.

lVithin the pump barrel-18 is mounted a discharge pipe 2G, through which the Huid content of the pump barrel is elevated by compressed ail" acting after each filling of the `barrel upon the top of the fluid column contamed therein. To prevent return of the fluid into the ump barrel from thedischarge pipe 2G, t e latter is provided with a check valve 28 at its lower end.

In the arrangement shown, the remaining elements of the pump include a pipe 17 for supporting the weight of the pump barrel 18 within the well, an uptake 29 formin a continuation of the discharge pi e 26 an preferably extending to the top o the Well, a compressed air supply pi e 31, and a coupling member, generally esignated 11. As the coupling member 11 is relied upon for uniting the pipes 26 and 29, it'is preferably formed with a tubular body 12, hav. ing threaded nipples 13 and 14 at its opposite ends. iAs shown, the nipple 14 is 1nternally threaded for direct connection with `the upper end of the dischar e pipe 26,

while the nipple 13 is externaly threaded pipe 29 by a union 30.

The coupling member 11 is alsorelied upon for providing a firm connection of the pump `barrel 18 with the supporting pipe 17. For this purpose the tubular body portion 12 of the said coupling member is referably threaded upon the outside otp the same throughout its length, and a pair of unions l5 and 16 are externally engaged with the body portion of the coupling 11 and with the supporting pipe 17 and the pump y barrel 18, respectively.

Thecompressed air supply pipe 31 may be of relatively small diameter and extends from the top of the well centrally throu h the pipe 29 to the lower end of the body portion 12 of the coupling member 11. As the adniixture of air with crude petroleum is believed to reduce the value of the latter probably by stimulating the evaporation of some o its more volatile constituents, it -is found desirable to employ the compressed air supplied through ipe 31 only for direct displacement of t e Enid contained in the pump barrel 18. The lower 'end of the air pipe 31 is accordingly entered in a threaded ni ple 24, the bore of which communicates wlth the bore 27 of a tubular bridge-piece 32 formed in the lower end of the body portion 12 of the coupling member l1, with rzo ports 33, 3l, opening into the upper end of the pump barrel 18 at o posite sides of the nip le 14. As the brit ge-pieoe 32, is desira ly of reduced width as compare with the diameters of the bores oi' the nipple 1t and ybody 12 of the coupling member- OPBIlings, 25 said bridge-piece provide ample room for the passage of fluid about the bridge-piece in the upward travel of the fluid from the discharge pipe 26 through the bore of the coupling member 11 tothe uptake pipe 29.

It will be understood that compressed air is only to be su plied through ipe 31 when the pump barre 18 has been fil ed with iui'd and it is desired to discharge the same either at the top of the well or into a com anion pump barrel (not shown) located at a igher level. Furthermore, While the pump barrel 18 will in some cases be filled with uid by the natural ilow of the Well into the well casing 10, and upwardly through the foot valve 20 when pipe 31 is open at its upper end (not shown) to the atmosphere, i't will frequently be desirable to induce the filling of the pumbarrel 18 by exhausting the same throu pipe 31. It is therefore contemplated t at the apparatus herein shown may be used in conjunction with the oil well pumping apparatus formin the subject of my ap ication for patent ed January 20, 1919, erial No. 272,152.

While the uptake pipe 29 contains fluid which would otherwise be confined by the supporting pipe 17, the use of this smaller (Fig. 2) at each side of the'` uptake pipe is sembly of the parts serves to guide the small air pipe 31 through tlie nipple 13 and into the nipple '24.

Similarly, when both the supporting pipe a cylin- .upper and iameter than said body a c linder pil'e projectin below said main bod'ysurrouiiding said ower extension, an intake pipe attached to said lower extension and having a check valve at its lower desirable since during the aslower end, a discharge pipe attached to said upper extension, der pressure to said cylinder exterior of said uptake pipe.

2. In a puni in combination, a cylindrical main body avng a. reduced .intake pipe extension at its lower portion, a cylinder attached to yand forming a practical-continuation of the walls of said body, surrounding said intake pipe, a discharge pipe extending upwlardly from said body, an air pipe located in the interior of said discharge pi e and body, and lateral branches from said air pipe to said cylinder.

RALPH GREGORY.

and mea-ns to admit air-iin *It is hereby certified that the State of incorporation of the in Lettcrs Patent No., 1,326,338, granted December 30, 11519, upon the application of Ralph Gregory, of Kansas City, Missouri, for an improvement in Uil-Well Pumps, was

V l erroneously given as Illinois, whereas said Stste should have bean given ns Delaware, as show'n by the record of assignments in this oice; and that the said Letton;

Patent should be road with this correction therointhat. thc sums muy conform to the record of the casa in the Patent Otiics. l I i Signed and scaled this 3d day of February, A.D., 1920. y

M. H. COULSTON, ding commu@ of Pam. 

